REFRACTIVE AND VISUAL OUTCOMES AFTER KERRARING VS FERRARA INTRASTROMAL CORNEAL RING SEGMENT IMPLANTATION FOR KERATOCONUS: A COMPARATIVE STUDY
Published 2022 - 26th ESCRS Winter Meeting
Reference: P181 | Type: Abstracts | DOI: 10.82333/d6qe-qd93
Authors: Ana Filipa Moleiro* 1 , Rodrigo Vilares-Morgado 1 , Raúl Moreira 1 , Luís Torrão 1 , Fernando Falcão-Reis 1 , João Pinheiro-Costa 1
1Department of Ophthalmology,Centro Hospitalar e Universitário de São João,Porto,Portugal
Purpose
To evaluate the refractive, topographic, optical, visual acuity, and quality outcomes of two types of intrastromal corneal ring segments (ICRS) in the treatment of keratoconus.
Setting
This study took place in the Department of Ophthalmology of Centro Hospitalar e Universitário de São João, a tertiary center from Portugal.
Methods
Restrospective study of eyes implanted with Ferrara ICRS and Keraring ICRS. Pre- and post-operative examinations, including best corrected visual acuity (BCVA), topography, and ocular wavefront analysis were performed. Statistical significance was considered when p<0.05.
Results
Ferrara ICRS were implanted in 30 eyes, while Keraring ICRS were implanted in 18 eyes. Keratoconus grade was similar in both groups (p>0.05).
BCVA (Snellen scale) improved significantly from 0.34±0.16 to 0.63 ± 0.17 in the Ferrara group (p<0.001) and from 0.39 ± 0,19 to 0.63±0.14 in Keraring group (p<0.001). The postoperative increase in visual acuity was not statistically different between the two groups (p>0.05).
Keratometry evaluation revealed a significant decrease of 1.8±1.7D and 2.0±1.5D in Ferrara and Keraring groups respectively (p<0.001) with no statistical differences between the groups (p>0.05).
Considering wavefront analysis, both groups are comparable regarding high order aberrations.
Conclusion